Bobbin stripper and method



Jan. 31, 1956 R. FERGUSON BOBBIN STRIPPER AND METHOD 3 Sheets-Sheet 1 Filed Nov. 23, 1951 INVENTOR. Elf/764170 F'RGt/JON 724a, fa4ma b-SW Jan. 31, 1956 R. FERGUSON BOBBIN STRIPPER AND METHOD 3 Sheets-Sheet 2 Filed Nov. 23, 1951 w Wk ww Q w. mv \Fu 1 xi n Wm $N WN- wk Nw mm @m m8 mm wm w v m L Nw m Q N Q. J I 1 5:4 ll C I: II. ,I. W |n I. IJFLI- v 1| N .I. .II m. N N I wN n m H ON h Q fizz 804M 5 SW A TTOIPNA'KS Jan. 31, 1956 R. FERGUSON 2,732,609

BOBBIN STRIPPER AND METHOD Filed Nov. 23, 1951 5 Sheets-Sheet 3 a 1 INVENTOR.

lP/Cl/A/PD FERGUSON BY United States Patent 2,732,609 BOBBIN STRIPPER AND METHOD Richard Ferguson, Terrell Machine Carolina Charlotte, N. C., assignor to The Company, a corporation of North This invention relates to bobbin strippers or cleaners such as are used for removing waste yarn windings from spent textile bobbins, and more particularly to an improved stripping mechanism for bobbin cleaning equipment of this sort.

- Briefly described, the bobbin stripper of the present invention is characterized by a stripping mechanism that operates to grip the waste yarn windings on a spent bobbin in a mannerthat allows the bobbin to be pushed out of the windings without disturbing their original tubular disposition, and that thereby provides a particularly effective stripping action because the normal tendency of the waste yarn windings to bunch as they are removed is entirely eliminated.

.This manner of operation is obtained according to the present invention by employing a stripping mechanism incorporating means for gripping the waste yarn windings uniformly over their entire extent lengthwise of the barrel portion of the spent bobbin to be stripped. In the representative embodiment illustrated and described herein, this means takes the form of inmate stripping jaws shaped in cross section to conform with the circumference of the bobbin barrel portion and proportioned in length to correspond substantially with the bobbin barrel length. Also, these stripping jaws are fitted according to'the present invention with a relatively yielding, non-abrasive, friction lining further adapting them for closing effectively on the bobbin barrel to grip the waste yarn windings, and providing the jaws with a greater aflinity for the windings than these windings have for the bobbin barrel from which they are to be stripped.

In addition tothe excellent stripping action obtainable with stripping jaws of. this type, the friction lining with which they are provided offers the further substantial advantage of making it possible to avoid any damage whatever to the bobbin barrel by attrition or otherwise as the yarn windings are removed. This latter feature of the stripping jaws also makes them entirely suitable for cleaning paper and plastic bobbins as well as the conventional wooden bobbins.

These and other features of the present invention are described in further detail below in connection with the accompanying drawings, in which:

Fig. 1 is a fragmentary side elevation illustrating the arrangement-of a bobbinstripper constructed-in accordance with the present invention;

Fig. 2 is a right end elevation corresponding generally to Fig. 1;

Fig. 3 is a fragmentary erally to Figs. 1 and 2;

Fig. 4 is a sectional detail taken substantially on the line 44 in Figs. 1 and 3;

Fig. 5 is an enlarged fragmentary detail showing the stripping jaws in section, and with a bobbin in place for stripping; and

Fig. 6 is a sectional detail plan view corresponding gendotted lines.

taken substantially at the line 6-6 in Fig. 5 withthe stripping jawsindicated in.

' an inclined feed chute Patented Jan. 31, 1956 The bobbin stripper of the present invention may be employed to particular advantage for cleaning card room or roving bobbins and it is accordingly illustrated and described below principally in relation to it's adaptation for this purpose as representative of the manner in which it may be likewise adapted for use in cleaning other types of. bobbins as well. In the drawings, theembodimenl shown comprises a frame structure 10 on which stripping jaws are arranged as indicated generally by the reference numeral 12 to act on spent bobbins B fed between them to have waste yarn windings W removed therefrom as they are ejected from the' jaws 12.- Y

The spent bobbins B illustrated in the drawings are typical card room bobbins in which the bobbin barrel is of cylindrical form, and which are characteristically left in their spent condition with residual waste yarn windings W, from the original yarn package carried thereon, that must be stripped from the bobbin barrel before the bobbin B canbe rc-used. These residual waste yarnwindings W are illustrated inthe-drawings with dispositions that are-representative of their condition on the spent bobbins B when ready for stripping, although these dispositions are obviously subject to considerable variation depending on such factors as the build employed for the original yarn package from which the waste windings W are left, the particular point at which delivery of the yarn end from the original package was finally interrupted to leave the spent bobbin B, and-the extent to which the residual waste yarn windings W may have become somewhatdisarranged in thecourse of handling the spent bobbins B prior to the stripping operations. These and other related factors may result in waste yarn windings W that extend for substantially the entire length of the bobbin barrel or that cover any lesser portion of the barrel length; that have the winding wraps closely or relatively widely spaced either in whole or in part; and that may consist of one or more layers of windings, although two or three layers are the most normally encountered on spent card room bobbins.

1 In any event, I have found that these waste yarn windings W, however arranged, may be stripped much more readily and with more consistent results than have here tofore been obtained, through the use of stripping means by which the waste yarn windings W are removed from the spent bobbin B without disturbing the disposition they have on the bobbin barrel when ready for stripping.

As previously noted, it is accordingly the form and Operation of the stripping means such as the jaws 12 that particularly characterize the present invention, and these jaws 12 may accordingly be associated in a bobbin stripper with any suitable form of bobbin feeding means and ejector mechanism to obtain the advantageous stripping action they afford.

In the presently described embodiment provision is made for feeding the spent bobbins B by gravity between the jaws 12 from a feeding means at 14 which comprises 16, as shown best in Fig. 2, arranged to contain a bank of the bobbins B to be stripped. The lowermost bobbin B of the bank contained in the feed chute 16 is normally supported therein by a fixed lug 18 (compare Fig. 3), which is disposed to act as a retainer adjacent the tip end of this lowermost bobbin B, and by an overhead finger 20 having a depending end aligned with the base portion of the bobbin B at its normal position in the feed chute 16 to act as a stop element.

, The feed chute 16, however, is formed at its lower end lateral shifting of the lowermost bobbin B in this manner a is accomplished during each stripping operation by means which will be described in detail presently.

As indicated in Figs. 1 and 2 of the drawings, the stripping jaws 12 are suitably arranged in a pair adapted to open and close in timed relation to the feeding of the bobbins B between them, although a greater plurality of jaw elements might be employed equally well to form the stripping jaws 12 if desirable or necessary in any particular instance. The pair of stripping jaws 12 shown in the drawings consists of a fixed lower jaw 22, which is supported directly on the frame structure it and a movable upper jaw 24, which is mounted on a rocker arm 26 that is arranged to rock on the frame structure 19 about a pivot point 28 for opening and closing movement of the upper jaw 24, the closed position of jaw 24 being shown in Fig. 2 by full lines and the open position in broken lines.

Normally the upper jaw 24 is biased in open position by a spring 30 extended from the remote end of the rocker arm 26 to a suitable anchor point as at 32. To

effect closing movement of the upper jaw 24, an air cylinder 34 or the like is mounted on the frame structure 10 with its piston rod 36 disposed for hearing against a spring 38 that is carried over a stud 40 fitted at the extending end of the piston rod 36. This spring 38 is positioned to bear in turn on the underside of the rocker arm 26 adjacent its remote end and thereby force the rocker arm 26 and upper jaw 24 to a closed position, which may be determined by a suitable stop member as at 42.

Actuation of the air cylinder 34 to elfect this closing 0 movement of the upper stripping jaw 24 may be conveniently controlled through an operating valve disposed as illustrated at 44 in Fig. l for operation automatically from the motion of a displacement element provided according to the present invention for ejecting the bobbins B from between the stripping jaws 12, as is explained further below.

The displacement element for the embodiment illustrated in the drawings takes the form of a reciprocating plunger member 46 mounted on the frame structure 10 as at 48 and 50 for sliding movement. The rearwardly extending end of the plunger member 46 carries a compression spring 52 disposed between the rear mounting block 50 and a. retaining clamp 54 for biasing the plunger member 46 rearwardly (i. e., for recovery).

Ahead of the rear mounting block 50, the plunger member 46 is further fitted with a collar member 56 which is fixed in place and is formed with a downwardly extending arm portion 58. The rear face of this arm portion 58 is adapted to provide a contact surface of suitable extent for a roller 60 carried at the upper end of an actuating lever 62 which is pivoted on the frame structure at 64 and carries a second roller 66 intermediately of its length to act as a cam follower in relation to a cam 68 driven by any suitable means (not shown) to actuate the reciprocating motion of the plunger member 46.

To adapt this plunger member 46 as a displacement element its forward end is fitted with a tip portion 70 which acts as a pusher head for displacing orejecting the bobbins B to be stripped from between the stripping jaws 12. This tip element or pusher head 70 is formed with wing portions 72 at each side that are disposed to move in the spacings between the adjacent edges of the stripping jaws 12 to collect and carry out of the jaws 12 the waste yarn windings W as they are stripped from the bobbins B in the course of each stripping operation.

The pusher head 70 may also be employed to actuate the previously mentioned operating valve 44 provided for controlling the air cylinder 34 by which closing movement of the stripping jaws 12 is effected. For this purpose, the operating or control valve 44 is suitably arranged with an actuating lever 74 that is disposed in the path of the pusher head 70 so that upon each forward movement of the plunger 46 this pusher head 70 comes in contact with the extending end of the actuating lever 74 and shifts it to cause actuation of the air cylinder 34 by the operating valve 44 for closing the stripping jaws 12 on the barrel portion of the interposed bobbin B as the pusher head 70 advances. This actuation of the control valve 44 for closing of the jaws 12 is maintained by the pusher head 70 and the plunger member 46 during the entire stripping operation, and it is not until the plunger member 46 is retracted on its recovery stroke that the valve actuating lever 74 is released to allow the stripping jaws 12 to open again as a result of the normal bias of spring 30.

When the stripping jaws 12 do open again, a succeeding bobbin B to be stripped is fed by gravity between the open jaws 12 from the feeding means 14 as already noted above, the previously mentioned lateral shifting of the lowermost bobbin B in the inclined feed chute 16 for delivery to the stripping jaws 12 being accomplished during each forward or working stroke of the plunger member 46 by an auxiliary plunger 76 associated therewith. This auxiliary plunger 76 is suitably supported on the frame structure 10 in a yoke as at 78 and is fitted with a positioning collar 80 between the legs of the yoke 78 to determine its rearwardly retracted position, the auxiliary plunger 76 being normally maintained in this retracted position by a compression spring 82 disposed over its shank between the positioning collar 80 and the front leg of the yoke 78.

In order to move the auxiliary plunger 76 forwardly for the lateral shifting of the lowermost bobbin B in the feed chute 16, the previously mentioned collar 56 fixed on the plunger member 46 is fitted with a laterally extending bracket 84 (as shown best in Fig. 4), the extending end portion of which is disposed in axial alignment with the auxiliary plunger 76 so that as the plunger member 46 moves through the latter portion of its forward stroke this extending portion of the lateral bracket 84 comes in contact with a spring 86 that is attached by a pin 88 with a trailing disposition at the rear end of the auxiliary plunger 76 (compare Figs. 1 and 3). This contact of the lateral bracket 84 with the trailing spring 86 causes the auxiliary plunger 76 to move forward just sufiiciently to displace the lowermost bobbin B laterally in the feed chute 16 for feeding to the jaws 12 as do scribed above, all further forward pressure of the lateral bracket 84 being absorbed by compression of the spring 86. As this happens during the latter portion of the forward stroke of plunger member 46, the forward pressure on the auxiliary plunger 76 is released after a short interval as the plunger member 46 begins its return stroke, so that after lateral displacement of the lowermost bobbin B the auxiliary plunger 76 is retracted promptly to allow the remaining bobbins B of the bank contained in the feed chute 16 to move downwardly in preparation for successive displacement and feeding of the remaining bobbins B in turn.

As previously mentioned, the stripping jaws 22 are pro vided with a friction lining and this arrangement is illustrated more in detail in Fig. 5 of the drawing, the friction lining being indicated at 91 This friction lining 5 may consist of any of a great variety of materials as long the particular material used is softer than the material from which the barrel portion of the bobbins B are formed so that it is non-abrasive with respect to the bobbin barrels, and so long as it has a greater afiinity than the bobbin barrels for the waste yarn windings to be stripped (i. c., has a greater coefficient of friction with respect to the waste yarn windings W than these yarn windings W have with respect to the bobbin barrels). Excellent results are obtained when a rubber lining 90 is used for the stripping jaws 12, although comparable stripping action can be obtained by using woven fabric lining materials, or the like. so long as materials having entirely unyielding or abrasive characteristics are avoided. The friction linings 90 may be secured to the stripping jaws 12 in any conventional manner, as by vulcanizing or with a suitable adhesive, and they are fitted to the stripping jaws 12 so as to be entirely coextensive with the inner jaw faces. I

As already noted, the stripping jaws 12 (which should be considered to include the linings 90) are arcuately shaped in cross section to conform with the circumference of the barrel portion of the bobbins B to be stripped and are proportioned in a length corresponding substantially with the length of the bobbin barrel portion (compare Fig. By substantial correspondence with the barrel portion length, it is meant that the stripping jaws 12 extend to close on the bobbin barrels over a major portion of theirlength sufiicient to grip the waste yarn windings W and remove them without difiiculty because of bunching. Normally, this length will be the length of the winding traverse used originally for placing yarn windings on the bobbins B.

By arcuate cross sectional shape to conform with the bobbin barrel circumference, it is meant that each jaw element of the stripping. jaws 12 is curved traversely to mate substantially with the bobbin barrel surface. This relation in shape is particularly important where the stripping jaws 12 are employed in a pair that substantially surrounds the bobbin barrel for stripping, as in the embodiment described herein; because the friction linings 90 will normally be sufiiciently resilient to give appreciably as the jaws 12 are closed to grip the bobbin barrel, and if the faces of the friction linings 90 are originally shaped in relation to the bobbin barrel circumference they can be made to grip the waste yarn windings at their extending edges even after giving as the jaws 12 are closed on the bobbin barrel by centrally applied pressure. In cases where the jaw elements are employed in narrower widths, their arcuate shape becomes progressively less important with the narrowing, but in any case it should be considered for the purpose of obtaining a uniform gripping contact over the entire face of the friction linings.

Even where the stripping jaws 12 are employed in a full width pair, as illustrated in the drawings, the arcuate form in cross section of each jaw 22 and 24 of the pair is less than semi-circular (compare Figs. 2 and 6) so that the adjacent edges of the jaws 22 and 24 are spaced in closed position. This spacing provides clearance for the wing portions 72 which are disposed on the pusher head 70 to catch and carry out of the jaws 12 the waste yarn windings W as they are stripped from the bobbin B. The arrangement of the pusher head 70 with wing portions 72 in this manner is illustrated in Fig. 6 of the drawings, in which the wing portions 72 are shown as plate-like cross pieces ,welded in place adjacent the rear end of the pusher head 70 so that they extend on both sides of the pusher head 70 to sweep the spacings between the edges of the jaws 12 as noted above. It should be noted in this connection that the disposition of the wing portion 72 adjacent the rear end of the pusher head 70'allows room for accumulation of the waste yarn windings W as they are stripped, and it is important to set them back on the pusher head 7% sufiiciently for this purpose.

The manner in which the stripping operation is carried out according to the present invention may be visualized by considering. the stripping jawsv 12 tohave justbeen closed on the barrel portion of a spent.bobbin B to be stripped as shown in Fig. 1, the closing of the jaws 12 having been actuated by movement of the pusher head 70 on the forward stroke of plunger member 46 to the dotted line position indicated in Fig. 1 so as to shift the actuating lever 74 for operation of valve 44. As the forward stroke of the plunger member 46 continues, the pusher head 70 comes in contact with the tip of the bobbin B that is gripped between the jaws 12 and displaces the bobbin B as it advances axially through the closed jaw 12. During this displacement of the bobbin B, the friction linings 90 of the jaws 12 hold and strip the waste yarn windings W cleanly from the bobbin barrel portion, the

stripped windings W being picked up and accumulated on the pusher head 70 by the wing portions 72.

The forward stroke of the plunger member 46 extends to advance the pusher head 70 entirely through the closed stripping jaws 12, as indicated by dotted lines in Fig. 3, so that the stripped bobbin B is completely displaced from the jaws 12 as this forward stroke ends. As a result, the stripped bobbin B is ejected from the jaws 12 to drop freely into any suitable collecting receptacle (not shown). The waste yarn windings W that have accumulated on the pusher head 70, and been carried out of the stripping jaws 12 by the wing portions 72, will be loosely disposed over the pusher head 70 because of its lesser diameter in relation to the bobbin barrel portion and will also drop off for collection and disposal as the plunger member 46 changes direction for its recovery stroke. At this time, the lateral shifting of the lowermost bobbin B in the feed chute 16 will already have been accomplished by the auxiliary plunger 76 in readiness for feeding to the jaws 12 assoon as they are opened, and the opening of the jaws 12 will occur as soon as the pusher head 70 returns past the valve actuating lever 74 as the plungermember 46 recovers for the succeeding stripping opera tion.

The present invention has been described in detail above for purposes of illustration only and is not intended to be limited by this description or otherwise except as defined in the appended claims.

I claim:

1. In a bobbin stripping machine for removing waste yarn windings from spent bobbins of the type having cylindrical barrels, the improvement which comprises means for simultaneously gripping all of the Waste yarn windings along the barrel portion of a spent bobbin in which the barrel is of cylindrical form and of substantially uniform diameter throughout the length, in combination with means for pushing said bobbin out of said simultaneously gripped yarn windings, whereby said windings may be removed from said bobbing without bunching.

2. In a bobbin stripping machine for removing waste yarn windings from spent bobbins of the type having cylindrical barrels, means for gripping the waste yarn windings along the barrel portion of a spent bobbin in which the barrel is of cylindrical form and of substantially unipushing said bobbin out of said windings While gripped by said first mentioned means.

3. In a bobbin stripping machine for removing waste yarn windings from spent bobbins of the type having cylindrical barrels, a stripping mechanism comprising stripping jaws shaped forgripping the waste yarn windings on a cylindrical bobbin barrel of substantially uniform diameter throughout its length over the entire extent of saidwindings lengthwise of said bobbin barrel, and means for pushing said bobbin barrel out of said windings while gripped by said stripping jaws.

4. In a bobbin stripper, a stripping mechanism comprising a plurality of stripping jaws arranged for closing on a cylindrical bobbin barrel of substantially uniform diameter throughout its length having waste yarn windings disposed thereon, said stripping jaws being shaped for gripping uniformly the entire extent of said windings lengthwise of said bobbin barrel when said jaws are closed thereon, and means for pushing said bobbin out of said windings while said stripping jaws are closed, whereby said waste yarn windings are held by said closed stripping jaws in their original disposition on said bobbin barrel without bunching as said bobbin is pushed therefrom.

5. The method of stripping waste yarn windings in bobbin stripping apparatus from a spent bobbin of the type having a cylindrical barrel of substantially uniform diameter throughout its length which comprises gripping said waste yarn windings by means holding said windings in their original disposition along the cylindrical barrel of said spent bobbin, and then pushing said bobbin out of said windings by ejecting means operating axially of said first mentioned means while said windings are gripped and thereby held in said original disposition by said first mentioned means.

6. The method of stripping waste yarn windings in bobbin stripping apparatus from a spent bobbin having a cylindrical barrel of substantially uniform diameter throughout its length which comprises gripping said waste yarn windings by means applying pressure normally in relation to the circumference of said cylindrical bobbin barrel and uniformly over the entire extent of said windings lengthwise of said bobbin barrel, and then pushing said bobbin out of said windings by ejecting means operating axially of said first mentioned means while said windings are gripped by said first mentioned means.

7. in a bobbin stripper, a plurality of stripping jaws arranged for closing on the barrel portion of a spent bobbin in which the barrel portion is cylindrical in form and of substantially uniform diameter throughout its length, and on which barrel portion waste yarn windings are disposed, said stripping jaws being shaped for gripping uniformly the entire extent of said windings lengthwise of said barrel portion so that upon closing on :2.

said barrel portion said jaws confine and hold said windings in their original disposition for stripping readily without bunching from said barrel portion.

8. In a bobbin stripper, a plurality of stripping jaws arranged for closing on the barrel portion of a spent bobbin having a cylindrical barrel portion of substantially uniform diameter throughout its length and on which waste yarn windings are disposed, said stripping jaws being shaped for simultaneously gripping all of said waste yarn windings upon closing on said bobbin barrel portion, and said stripping jaws being lined with a material that is non-abrasive with respect to said barrel portion and that has a greater affinity than said barrel portion for said waste yarn windings.

9. in a bobbin stripper for removing waste yarn windings from spent bobbins of the type having cylindrical barrels of substantially uniform diameter throughout their length, a pair of stripping jaws proportioned in a length corresponding substantially with the length of the cylindrical barrel portion of the bobbin to be stripped; shaped in cross section to conform with the circumference of said cylindrical barrel portion; and lined with a material that is softer than the material from which said barrel portion is formed and that has a greater coetficient of friction with respect to waste yarn windings on said barrel portion than said yarn windings have with respect to said barrel portion.

10. In a bobbin stripper for removing waste yarn windin s from spent bobbins of the type having cylindrical barrels of substantially uniform diameter through out their length, the improvement which comprises stripping jaws proportioned for gripping the cylindrical barrel portion of the spent bobbin to be stripped over a major portion of its length, said stripping jaws being shaped in cross section to conform with the circumference of said cylindrical barrel portion and being lined with a material that is non-abrasive with respect to said barrel portion and that has a greater afiinity than said barrel portion for waste yarn windings to be stripped therefrom.

ll. In a bobbin stripper for removing waste yarn windings from a spent bobbin of the type having a cylindrical barrel of substantially uniform diameter throughout its length, a plurality of stripping jaws adapted for gripping the cylindrical barrel portion of said bobbin over a major portion of its length and lined with a friction material that is non-abrasive with respect to said bobbin barrel portion.

12. A bobbin stripper for removing waste yarn windings from spent bobbins of the type having cylindrical barrels of substantially uniform diameter throughout their length comprising stripping jaws arranged for gripping lit) waste yarn windings on the cylindrical barrel portion of said bobbins over the entire extent of said windings lengthwise of said barrel portion, means for opening and closing said jaws, and means for ejecting from said jaws when closed spent bobbins placed therebetween when 13. A bobbin stripper for removing waste yarn windings from spent bobbins of the type having cylindrical barrels of substantially uniform diameter throughout their length comprising stripping jaws arranged for gripping waste yarn windings on the cylindrical barrel portion of said bobbins over substantially the entire length of said barrel portion, means for opening and closing said jaws, and means for feeding said bobbins between said jaws when open and for ejecting said bobbins therefrom when closed.

14. A bobbin stripper for removing waste yarn windings from spent bobbins of the type having cylindrical barrels of substantially uniform diameter throughout their length comprising stripping jaws arranged for gripping waste yarn windings on the cylindrical barrel portion of said bobbins over substantially the entire length of said barrel portion, means for opening and closing said jaws, and a displacement element arranged for travel axially through said jaws when closed for ejecting therefrom a spent bobbin placed between said jaws when open.

15. In a bobbin stripper for removing waste yarn winding from it spent bobbin of the type having a cylindrical barrel of substantially uniform diameter throughout its length, in combination, arcuate stripping jaws adapted for closing on the cylindrical barrel portion of a spent bobbin over a major portion of its length, operating means for said stripping jaws biased for normally maintaining said jaws in open position, means for actuating said operating means to close said jaws on a spent bobbin placed therebetween, and means for displacing said bobbin from between said closed jaws.

16. in a bobbin stripper for removing waste yarn windings from a spent bobbin of the type having a cylindrical barrel of substantially uniform diameter throughout its length, in combination, arcuate stripping jaws adapted for closing on and thereby gripping waste yarn windings on the cylindrical barrel portion of a spent bobbin over a major portion of the length of said barrel portion, operating means for said stripping jaws arranged. for disposing said jaws in open position to receive a spent bobbin therebetween, means for actuating said operating means to close said jaws on the barrel portion of said bobbin, and means for displacing said bobbin from between said closed jaws.

17. In a bobbin stripper for removing waste yarn windings from a spent bobbin of the type having a cylindrical barrel, a plurality of stripping jaws arranged for closing on and thereby gripping waste yarn windings on the cylindrical barrel portion of said bobbin over a major portion of the length of said barrel portion, and means for displacing said bobbin from between said closed jaws, said jaws being shaped in cross section so that at least one spacing is formed between adjacent cdges thereof in closed position, and said displacing means being formed to sweep at least one such spacing and thereby carry out of said jaws the waste yarn windings removed as said bobbin is displaced.

18. In a bobbin stripper for removing waste yarn wiud logs from a spent bobbin of the type having a cylindrical barrel, a pair of stripping jaws adapted for closing on and thereby gripping waste yarn windings on the cylindrical barrel portion of said bobbin over a major portion of the length of said barrel portion, and means for displacing said bobbin from between said closed jaws, each of said stripping jaws being less than semicircular in cross section whereby the adjacent edges thereof are spaced in closed position, and said displacing means being formed to sweep said spacings and thereby carry out of said jaws the waste yarn windings removed as said bobbin is displaced.

19. In a bobbin stripper for removing waste yarn windings from a spent bobbin of the type having a cylindrical barrel, a pair of arcuate stripping jaws arranged for closing on waste yarn windings on the cylindrical barrel portion of said bobbin over a major portion of the length of said barrel portion, said jaws being shaped in cross section so that adjacent edges thereof are spaced in closed position, and a displacement element arranged for travel axially through said jaws when closed for ejecting said bobbin therefrom, said displacement element being formed with at least one wing portion disposed for moving through a spacing between said closed jaw edges and thereby serving to carry out of said jaws the waste yarn windings removed as said bobbin is ejected.

20. In a bobbin stripper for removing waste yarn windings from spent bobbins of the type having cylindrical barrels, in combination, arcuate stripping jaws arranged for closing on waste yarn windings on the cylindrical barrel portion of said bobbins over a major portion of the length of said barrel portion, operating means for said stripping jaws biased for normally maintaining said jaws in open position, means for maintaining a bank of said bobbins for feeding between said jaws, a reciprocating plunger member disposed for movement axially through said jaws when closed, means responsive to the movement of said plunger member toward said jaws for actuating said operating means to close said jaws, and means associated with said anger member and operable during each movement 0t said plunger through said closed jaws for disposing a bobbin from said bank in position to be fed by gravity between said jaws when they are opened.

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